2 * Copyright © 2013 Keith Packard
3 * Copyright © 2015 Boyan Ding
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting documentation, and
9 * that the name of the copyright holders not be used in advertising or
10 * publicity pertaining to distribution of the software without specific,
11 * written prior permission. The copyright holders make no representations
12 * about the suitability of this software for any purpose. It is provided "as
13 * is" without express or implied warranty.
15 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
29 #include <X11/xshmfence.h>
32 #include <xcb/present.h>
34 #include <X11/Xlib-xcb.h>
36 #include "loader_dri3_helper.h"
37 #include "util/macros.h"
38 #include "drm-uapi/drm_fourcc.h"
40 /* From xmlpool/options.h, user exposed so should be stable */
41 #define DRI_CONF_VBLANK_NEVER 0
42 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
43 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
44 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
47 * A cached blit context.
49 struct loader_dri3_blit_context
{
52 __DRIscreen
*cur_screen
;
53 const __DRIcoreExtension
*core
;
56 /* For simplicity we maintain the cache only for a single screen at a time */
57 static struct loader_dri3_blit_context blit_context
= {
58 _MTX_INITIALIZER_NP
, NULL
62 dri3_flush_present_events(struct loader_dri3_drawable
*draw
);
64 static struct loader_dri3_buffer
*
65 dri3_find_back_alloc(struct loader_dri3_drawable
*draw
);
68 get_screen_for_root(xcb_connection_t
*conn
, xcb_window_t root
)
70 xcb_screen_iterator_t screen_iter
=
71 xcb_setup_roots_iterator(xcb_get_setup(conn
));
73 for (; screen_iter
.rem
; xcb_screen_next (&screen_iter
)) {
74 if (screen_iter
.data
->root
== root
)
75 return screen_iter
.data
;
81 static xcb_visualtype_t
*
82 get_xcb_visualtype_for_depth(struct loader_dri3_drawable
*draw
, int depth
)
84 xcb_visualtype_iterator_t visual_iter
;
85 xcb_screen_t
*screen
= draw
->screen
;
86 xcb_depth_iterator_t depth_iter
;
91 depth_iter
= xcb_screen_allowed_depths_iterator(screen
);
92 for (; depth_iter
.rem
; xcb_depth_next(&depth_iter
)) {
93 if (depth_iter
.data
->depth
!= depth
)
96 visual_iter
= xcb_depth_visuals_iterator(depth_iter
.data
);
98 return visual_iter
.data
;
104 /* Sets the adaptive sync window property state. */
106 set_adaptive_sync_property(xcb_connection_t
*conn
, xcb_drawable_t drawable
,
109 static char const name
[] = "_VARIABLE_REFRESH";
110 xcb_intern_atom_cookie_t cookie
;
111 xcb_intern_atom_reply_t
* reply
;
112 xcb_void_cookie_t check
;
114 cookie
= xcb_intern_atom(conn
, 0, strlen(name
), name
);
115 reply
= xcb_intern_atom_reply(conn
, cookie
, NULL
);
120 check
= xcb_change_property_checked(conn
, XCB_PROP_MODE_REPLACE
,
121 drawable
, reply
->atom
,
122 XCB_ATOM_CARDINAL
, 32, 1, &state
);
124 check
= xcb_delete_property_checked(conn
, drawable
, reply
->atom
);
126 xcb_discard_reply(conn
, check
.sequence
);
130 /* Get red channel mask for given drawable at given depth. */
132 dri3_get_red_mask_for_depth(struct loader_dri3_drawable
*draw
, int depth
)
134 xcb_visualtype_t
*visual
= get_xcb_visualtype_for_depth(draw
, depth
);
137 return visual
->red_mask
;
143 * Do we have blit functionality in the image blit extension?
145 * \param draw[in] The drawable intended to blit from / to.
146 * \return true if we have blit functionality. false otherwise.
148 static bool loader_dri3_have_image_blit(const struct loader_dri3_drawable
*draw
)
150 return draw
->ext
->image
->base
.version
>= 9 &&
151 draw
->ext
->image
->blitImage
!= NULL
;
155 * Get and lock (for use with the current thread) a dri context associated
156 * with the drawable's dri screen. The context is intended to be used with
157 * the dri image extension's blitImage method.
159 * \param draw[in] Pointer to the drawable whose dri screen we want a
161 * \return A dri context or NULL if context creation failed.
163 * When the caller is done with the context (even if the context returned was
164 * NULL), the caller must call loader_dri3_blit_context_put.
166 static __DRIcontext
*
167 loader_dri3_blit_context_get(struct loader_dri3_drawable
*draw
)
169 mtx_lock(&blit_context
.mtx
);
171 if (blit_context
.ctx
&& blit_context
.cur_screen
!= draw
->dri_screen
) {
172 blit_context
.core
->destroyContext(blit_context
.ctx
);
173 blit_context
.ctx
= NULL
;
176 if (!blit_context
.ctx
) {
177 blit_context
.ctx
= draw
->ext
->core
->createNewContext(draw
->dri_screen
,
179 blit_context
.cur_screen
= draw
->dri_screen
;
180 blit_context
.core
= draw
->ext
->core
;
183 return blit_context
.ctx
;
187 * Release (for use with other threads) a dri context previously obtained using
188 * loader_dri3_blit_context_get.
191 loader_dri3_blit_context_put(void)
193 mtx_unlock(&blit_context
.mtx
);
197 * Blit (parts of) the contents of a DRI image to another dri image
199 * \param draw[in] The drawable which owns the images.
200 * \param dst[in] The destination image.
201 * \param src[in] The source image.
202 * \param dstx0[in] Start destination coordinate.
203 * \param dsty0[in] Start destination coordinate.
204 * \param width[in] Blit width.
205 * \param height[in] Blit height.
206 * \param srcx0[in] Start source coordinate.
207 * \param srcy0[in] Start source coordinate.
208 * \param flush_flag[in] Image blit flush flag.
209 * \return true iff successful.
212 loader_dri3_blit_image(struct loader_dri3_drawable
*draw
,
213 __DRIimage
*dst
, __DRIimage
*src
,
214 int dstx0
, int dsty0
, int width
, int height
,
215 int srcx0
, int srcy0
, int flush_flag
)
217 __DRIcontext
*dri_context
;
218 bool use_blit_context
= false;
220 if (!loader_dri3_have_image_blit(draw
))
223 dri_context
= draw
->vtable
->get_dri_context(draw
);
225 if (!dri_context
|| !draw
->vtable
->in_current_context(draw
)) {
226 dri_context
= loader_dri3_blit_context_get(draw
);
227 use_blit_context
= true;
228 flush_flag
|= __BLIT_FLAG_FLUSH
;
232 draw
->ext
->image
->blitImage(dri_context
, dst
, src
, dstx0
, dsty0
,
233 width
, height
, srcx0
, srcy0
,
234 width
, height
, flush_flag
);
236 if (use_blit_context
)
237 loader_dri3_blit_context_put();
239 return dri_context
!= NULL
;
243 dri3_fence_reset(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
245 xshmfence_reset(buffer
->shm_fence
);
249 dri3_fence_set(struct loader_dri3_buffer
*buffer
)
251 xshmfence_trigger(buffer
->shm_fence
);
255 dri3_fence_trigger(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
257 xcb_sync_trigger_fence(c
, buffer
->sync_fence
);
261 dri3_fence_await(xcb_connection_t
*c
, struct loader_dri3_drawable
*draw
,
262 struct loader_dri3_buffer
*buffer
)
265 xshmfence_await(buffer
->shm_fence
);
267 mtx_lock(&draw
->mtx
);
268 dri3_flush_present_events(draw
);
269 mtx_unlock(&draw
->mtx
);
274 dri3_update_num_back(struct loader_dri3_drawable
*draw
)
276 if (draw
->last_present_mode
== XCB_PRESENT_COMPLETE_MODE_FLIP
)
283 loader_dri3_set_swap_interval(struct loader_dri3_drawable
*draw
, int interval
)
285 draw
->swap_interval
= interval
;
288 /** dri3_free_render_buffer
290 * Free everything associated with one render buffer including pixmap, fence
291 * stuff and the driver image
294 dri3_free_render_buffer(struct loader_dri3_drawable
*draw
,
295 struct loader_dri3_buffer
*buffer
)
297 if (buffer
->own_pixmap
)
298 xcb_free_pixmap(draw
->conn
, buffer
->pixmap
);
299 xcb_sync_destroy_fence(draw
->conn
, buffer
->sync_fence
);
300 xshmfence_unmap_shm(buffer
->shm_fence
);
301 draw
->ext
->image
->destroyImage(buffer
->image
);
302 if (buffer
->linear_buffer
)
303 draw
->ext
->image
->destroyImage(buffer
->linear_buffer
);
308 loader_dri3_drawable_fini(struct loader_dri3_drawable
*draw
)
312 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
314 for (i
= 0; i
< ARRAY_SIZE(draw
->buffers
); i
++) {
315 if (draw
->buffers
[i
])
316 dri3_free_render_buffer(draw
, draw
->buffers
[i
]);
319 if (draw
->special_event
) {
320 xcb_void_cookie_t cookie
=
321 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
322 XCB_PRESENT_EVENT_MASK_NO_EVENT
);
324 xcb_discard_reply(draw
->conn
, cookie
.sequence
);
325 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
328 cnd_destroy(&draw
->event_cnd
);
329 mtx_destroy(&draw
->mtx
);
333 loader_dri3_drawable_init(xcb_connection_t
*conn
,
334 xcb_drawable_t drawable
,
335 __DRIscreen
*dri_screen
,
336 bool is_different_gpu
,
337 bool multiplanes_available
,
338 const __DRIconfig
*dri_config
,
339 struct loader_dri3_extensions
*ext
,
340 const struct loader_dri3_vtable
*vtable
,
341 struct loader_dri3_drawable
*draw
)
343 xcb_get_geometry_cookie_t cookie
;
344 xcb_get_geometry_reply_t
*reply
;
345 xcb_generic_error_t
*error
;
346 GLint vblank_mode
= DRI_CONF_VBLANK_DEF_INTERVAL_1
;
351 draw
->vtable
= vtable
;
352 draw
->drawable
= drawable
;
353 draw
->dri_screen
= dri_screen
;
354 draw
->is_different_gpu
= is_different_gpu
;
355 draw
->multiplanes_available
= multiplanes_available
;
358 draw
->have_fake_front
= 0;
359 draw
->first_init
= true;
360 draw
->adaptive_sync
= false;
361 draw
->adaptive_sync_active
= false;
363 draw
->cur_blit_source
= -1;
364 draw
->back_format
= __DRI_IMAGE_FORMAT_NONE
;
365 mtx_init(&draw
->mtx
, mtx_plain
);
366 cnd_init(&draw
->event_cnd
);
368 if (draw
->ext
->config
) {
369 unsigned char adaptive_sync
= 0;
371 draw
->ext
->config
->configQueryi(draw
->dri_screen
,
372 "vblank_mode", &vblank_mode
);
374 draw
->ext
->config
->configQueryb(draw
->dri_screen
,
378 draw
->adaptive_sync
= adaptive_sync
;
381 if (!draw
->adaptive_sync
)
382 set_adaptive_sync_property(conn
, draw
->drawable
, false);
384 switch (vblank_mode
) {
385 case DRI_CONF_VBLANK_NEVER
:
386 case DRI_CONF_VBLANK_DEF_INTERVAL_0
:
389 case DRI_CONF_VBLANK_DEF_INTERVAL_1
:
390 case DRI_CONF_VBLANK_ALWAYS_SYNC
:
395 draw
->swap_interval
= swap_interval
;
397 dri3_update_num_back(draw
);
399 /* Create a new drawable */
401 draw
->ext
->image_driver
->createNewDrawable(dri_screen
,
405 if (!draw
->dri_drawable
)
408 cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
409 reply
= xcb_get_geometry_reply(draw
->conn
, cookie
, &error
);
410 if (reply
== NULL
|| error
!= NULL
) {
411 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
415 draw
->screen
= get_screen_for_root(draw
->conn
, reply
->root
);
416 draw
->width
= reply
->width
;
417 draw
->height
= reply
->height
;
418 draw
->depth
= reply
->depth
;
419 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
422 draw
->swap_method
= __DRI_ATTRIB_SWAP_UNDEFINED
;
423 if (draw
->ext
->core
->base
.version
>= 2) {
424 (void )draw
->ext
->core
->getConfigAttrib(dri_config
,
425 __DRI_ATTRIB_SWAP_METHOD
,
430 * Make sure server has the same swap interval we do for the new
433 loader_dri3_set_swap_interval(draw
, swap_interval
);
439 * Process one Present event
442 dri3_handle_present_event(struct loader_dri3_drawable
*draw
,
443 xcb_present_generic_event_t
*ge
)
445 switch (ge
->evtype
) {
446 case XCB_PRESENT_CONFIGURE_NOTIFY
: {
447 xcb_present_configure_notify_event_t
*ce
= (void *) ge
;
449 draw
->width
= ce
->width
;
450 draw
->height
= ce
->height
;
451 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
452 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
455 case XCB_PRESENT_COMPLETE_NOTIFY
: {
456 xcb_present_complete_notify_event_t
*ce
= (void *) ge
;
458 /* Compute the processed SBC number from the received 32-bit serial number
459 * merged with the upper 32-bits of the sent 64-bit serial number while
462 if (ce
->kind
== XCB_PRESENT_COMPLETE_KIND_PIXMAP
) {
463 uint64_t recv_sbc
= (draw
->send_sbc
& 0xffffffff00000000LL
) | ce
->serial
;
465 /* Only assume wraparound if that results in exactly the previous
466 * SBC + 1, otherwise ignore received SBC > sent SBC (those are
467 * probably from a previous loader_dri3_drawable instance) to avoid
468 * calculating bogus target MSC values in loader_dri3_swap_buffers_msc
470 if (recv_sbc
<= draw
->send_sbc
)
471 draw
->recv_sbc
= recv_sbc
;
472 else if (recv_sbc
== (draw
->recv_sbc
+ 0x100000001ULL
))
473 draw
->recv_sbc
= recv_sbc
- 0x100000000ULL
;
475 /* When moving from flip to copy, we assume that we can allocate in
476 * a more optimal way if we don't need to cater for the display
479 if (ce
->mode
== XCB_PRESENT_COMPLETE_MODE_COPY
&&
480 draw
->last_present_mode
== XCB_PRESENT_COMPLETE_MODE_FLIP
) {
481 for (int b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
482 if (draw
->buffers
[b
])
483 draw
->buffers
[b
]->reallocate
= true;
487 /* If the server tells us that our allocation is suboptimal, we
490 #ifdef HAVE_DRI3_MODIFIERS
491 if (ce
->mode
== XCB_PRESENT_COMPLETE_MODE_SUBOPTIMAL_COPY
&&
492 draw
->last_present_mode
!= ce
->mode
) {
493 for (int b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
494 if (draw
->buffers
[b
])
495 draw
->buffers
[b
]->reallocate
= true;
499 draw
->last_present_mode
= ce
->mode
;
501 if (draw
->vtable
->show_fps
)
502 draw
->vtable
->show_fps(draw
, ce
->ust
);
506 } else if (ce
->serial
== draw
->eid
) {
507 draw
->notify_ust
= ce
->ust
;
508 draw
->notify_msc
= ce
->msc
;
512 case XCB_PRESENT_EVENT_IDLE_NOTIFY
: {
513 xcb_present_idle_notify_event_t
*ie
= (void *) ge
;
516 for (b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
517 struct loader_dri3_buffer
*buf
= draw
->buffers
[b
];
519 if (buf
&& buf
->pixmap
== ie
->pixmap
)
529 dri3_wait_for_event_locked(struct loader_dri3_drawable
*draw
)
531 xcb_generic_event_t
*ev
;
532 xcb_present_generic_event_t
*ge
;
534 xcb_flush(draw
->conn
);
536 /* Only have one thread waiting for events at a time */
537 if (draw
->has_event_waiter
) {
538 cnd_wait(&draw
->event_cnd
, &draw
->mtx
);
539 /* Another thread has updated the protected info, so retest. */
542 draw
->has_event_waiter
= true;
543 /* Allow other threads access to the drawable while we're waiting. */
544 mtx_unlock(&draw
->mtx
);
545 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
546 mtx_lock(&draw
->mtx
);
547 draw
->has_event_waiter
= false;
548 cnd_broadcast(&draw
->event_cnd
);
553 dri3_handle_present_event(draw
, ge
);
557 /** loader_dri3_wait_for_msc
559 * Get the X server to send an event when the target msc/divisor/remainder is
563 loader_dri3_wait_for_msc(struct loader_dri3_drawable
*draw
,
565 int64_t divisor
, int64_t remainder
,
566 int64_t *ust
, int64_t *msc
, int64_t *sbc
)
568 xcb_void_cookie_t cookie
= xcb_present_notify_msc(draw
->conn
,
574 xcb_generic_event_t
*ev
;
575 unsigned full_sequence
;
577 mtx_lock(&draw
->mtx
);
578 xcb_flush(draw
->conn
);
580 /* Wait for the event */
582 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
584 mtx_unlock(&draw
->mtx
);
588 full_sequence
= ev
->full_sequence
;
589 dri3_handle_present_event(draw
, (void *) ev
);
590 } while (full_sequence
!= cookie
.sequence
|| draw
->notify_msc
< target_msc
);
592 *ust
= draw
->notify_ust
;
593 *msc
= draw
->notify_msc
;
594 *sbc
= draw
->recv_sbc
;
595 mtx_unlock(&draw
->mtx
);
600 /** loader_dri3_wait_for_sbc
602 * Wait for the completed swap buffer count to reach the specified
603 * target. Presumably the application knows that this will be reached with
604 * outstanding complete events, or we're going to be here awhile.
607 loader_dri3_wait_for_sbc(struct loader_dri3_drawable
*draw
,
608 int64_t target_sbc
, int64_t *ust
,
609 int64_t *msc
, int64_t *sbc
)
611 /* From the GLX_OML_sync_control spec:
613 * "If <target_sbc> = 0, the function will block until all previous
614 * swaps requested with glXSwapBuffersMscOML for that window have
617 mtx_lock(&draw
->mtx
);
619 target_sbc
= draw
->send_sbc
;
621 while (draw
->recv_sbc
< target_sbc
) {
622 if (!dri3_wait_for_event_locked(draw
)) {
623 mtx_unlock(&draw
->mtx
);
630 *sbc
= draw
->recv_sbc
;
631 mtx_unlock(&draw
->mtx
);
635 /** loader_dri3_find_back
637 * Find an idle back buffer. If there isn't one, then
638 * wait for a present idle notify event from the X server
641 dri3_find_back(struct loader_dri3_drawable
*draw
)
646 mtx_lock(&draw
->mtx
);
647 /* Increase the likelyhood of reusing current buffer */
648 dri3_flush_present_events(draw
);
650 /* Check whether we need to reuse the current back buffer as new back.
651 * In that case, wait until it's not busy anymore.
653 num_to_consider
= draw
->num_back
;
654 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1) {
656 draw
->cur_blit_source
= -1;
660 for (b
= 0; b
< num_to_consider
; b
++) {
661 int id
= LOADER_DRI3_BACK_ID((b
+ draw
->cur_back
) % draw
->num_back
);
662 struct loader_dri3_buffer
*buffer
= draw
->buffers
[id
];
664 if (!buffer
|| !buffer
->busy
) {
666 mtx_unlock(&draw
->mtx
);
670 if (!dri3_wait_for_event_locked(draw
)) {
671 mtx_unlock(&draw
->mtx
);
677 static xcb_gcontext_t
678 dri3_drawable_gc(struct loader_dri3_drawable
*draw
)
682 xcb_create_gc(draw
->conn
,
683 (draw
->gc
= xcb_generate_id(draw
->conn
)),
685 XCB_GC_GRAPHICS_EXPOSURES
,
692 static struct loader_dri3_buffer
*
693 dri3_back_buffer(struct loader_dri3_drawable
*draw
)
695 return draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)];
698 static struct loader_dri3_buffer
*
699 dri3_fake_front_buffer(struct loader_dri3_drawable
*draw
)
701 return draw
->buffers
[LOADER_DRI3_FRONT_ID
];
705 dri3_copy_area(xcb_connection_t
*c
,
706 xcb_drawable_t src_drawable
,
707 xcb_drawable_t dst_drawable
,
716 xcb_void_cookie_t cookie
;
718 cookie
= xcb_copy_area_checked(c
,
728 xcb_discard_reply(c
, cookie
.sequence
);
732 * Asks the driver to flush any queued work necessary for serializing with the
733 * X command stream, and optionally the slightly more strict requirement of
734 * glFlush() equivalence (which would require flushing even if nothing had
735 * been drawn to a window system framebuffer, for example).
738 loader_dri3_flush(struct loader_dri3_drawable
*draw
,
740 enum __DRI2throttleReason throttle_reason
)
742 /* NEED TO CHECK WHETHER CONTEXT IS NULL */
743 __DRIcontext
*dri_context
= draw
->vtable
->get_dri_context(draw
);
746 draw
->ext
->flush
->flush_with_flags(dri_context
, draw
->dri_drawable
,
747 flags
, throttle_reason
);
752 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable
*draw
,
754 int width
, int height
,
757 struct loader_dri3_buffer
*back
;
758 unsigned flags
= __DRI2_FLUSH_DRAWABLE
;
760 /* Check we have the right attachments */
761 if (!draw
->have_back
|| draw
->is_pixmap
)
765 flags
|= __DRI2_FLUSH_CONTEXT
;
766 loader_dri3_flush(draw
, flags
, __DRI2_THROTTLE_COPYSUBBUFFER
);
768 back
= dri3_find_back_alloc(draw
);
772 y
= draw
->height
- y
- height
;
774 if (draw
->is_different_gpu
) {
775 /* Update the linear buffer part of the back buffer
776 * for the dri3_copy_area operation
778 (void) loader_dri3_blit_image(draw
,
781 0, 0, back
->width
, back
->height
,
782 0, 0, __BLIT_FLAG_FLUSH
);
785 loader_dri3_swapbuffer_barrier(draw
);
786 dri3_fence_reset(draw
->conn
, back
);
787 dri3_copy_area(draw
->conn
,
790 dri3_drawable_gc(draw
),
791 x
, y
, x
, y
, width
, height
);
792 dri3_fence_trigger(draw
->conn
, back
);
793 /* Refresh the fake front (if present) after we just damaged the real
796 if (draw
->have_fake_front
&&
797 !loader_dri3_blit_image(draw
,
798 dri3_fake_front_buffer(draw
)->image
,
801 x
, y
, __BLIT_FLAG_FLUSH
) &&
802 !draw
->is_different_gpu
) {
803 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
804 dri3_copy_area(draw
->conn
,
806 dri3_fake_front_buffer(draw
)->pixmap
,
807 dri3_drawable_gc(draw
),
808 x
, y
, x
, y
, width
, height
);
809 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
810 dri3_fence_await(draw
->conn
, NULL
, dri3_fake_front_buffer(draw
));
812 dri3_fence_await(draw
->conn
, draw
, back
);
816 loader_dri3_copy_drawable(struct loader_dri3_drawable
*draw
,
820 loader_dri3_flush(draw
, __DRI2_FLUSH_DRAWABLE
, __DRI2_THROTTLE_COPYSUBBUFFER
);
822 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
823 dri3_copy_area(draw
->conn
,
825 dri3_drawable_gc(draw
),
826 0, 0, 0, 0, draw
->width
, draw
->height
);
827 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
828 dri3_fence_await(draw
->conn
, draw
, dri3_fake_front_buffer(draw
));
832 loader_dri3_wait_x(struct loader_dri3_drawable
*draw
)
834 struct loader_dri3_buffer
*front
;
836 if (draw
== NULL
|| !draw
->have_fake_front
)
839 front
= dri3_fake_front_buffer(draw
);
841 loader_dri3_copy_drawable(draw
, front
->pixmap
, draw
->drawable
);
843 /* In the psc->is_different_gpu case, the linear buffer has been updated,
844 * but not yet the tiled buffer.
845 * Copy back to the tiled buffer we use for rendering.
846 * Note that we don't need flushing.
848 if (draw
->is_different_gpu
)
849 (void) loader_dri3_blit_image(draw
,
851 front
->linear_buffer
,
852 0, 0, front
->width
, front
->height
,
857 loader_dri3_wait_gl(struct loader_dri3_drawable
*draw
)
859 struct loader_dri3_buffer
*front
;
861 if (draw
== NULL
|| !draw
->have_fake_front
)
864 front
= dri3_fake_front_buffer(draw
);
866 /* In the psc->is_different_gpu case, we update the linear_buffer
867 * before updating the real front.
869 if (draw
->is_different_gpu
)
870 (void) loader_dri3_blit_image(draw
,
871 front
->linear_buffer
,
873 0, 0, front
->width
, front
->height
,
874 0, 0, __BLIT_FLAG_FLUSH
);
875 loader_dri3_swapbuffer_barrier(draw
);
876 loader_dri3_copy_drawable(draw
, draw
->drawable
, front
->pixmap
);
879 /** dri3_flush_present_events
881 * Process any present events that have been received from the X server
884 dri3_flush_present_events(struct loader_dri3_drawable
*draw
)
886 /* Check to see if any configuration changes have occurred
887 * since we were last invoked
889 if (draw
->has_event_waiter
)
892 if (draw
->special_event
) {
893 xcb_generic_event_t
*ev
;
895 while ((ev
= xcb_poll_for_special_event(draw
->conn
,
896 draw
->special_event
)) != NULL
) {
897 xcb_present_generic_event_t
*ge
= (void *) ev
;
898 dri3_handle_present_event(draw
, ge
);
903 /** loader_dri3_swap_buffers_msc
905 * Make the current back buffer visible using the present extension
908 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable
*draw
,
909 int64_t target_msc
, int64_t divisor
,
910 int64_t remainder
, unsigned flush_flags
,
913 struct loader_dri3_buffer
*back
;
915 uint32_t options
= XCB_PRESENT_OPTION_NONE
;
917 draw
->vtable
->flush_drawable(draw
, flush_flags
);
919 back
= dri3_find_back_alloc(draw
);
921 mtx_lock(&draw
->mtx
);
923 if (draw
->adaptive_sync
&& !draw
->adaptive_sync_active
) {
924 set_adaptive_sync_property(draw
->conn
, draw
->drawable
, true);
925 draw
->adaptive_sync_active
= true;
928 if (draw
->is_different_gpu
&& back
) {
929 /* Update the linear buffer before presenting the pixmap */
930 (void) loader_dri3_blit_image(draw
,
933 0, 0, back
->width
, back
->height
,
934 0, 0, __BLIT_FLAG_FLUSH
);
937 /* If we need to preload the new back buffer, remember the source.
938 * The force_copy parameter is used by EGL to attempt to preserve
939 * the back buffer across a call to this function.
941 if (draw
->swap_method
!= __DRI_ATTRIB_SWAP_UNDEFINED
|| force_copy
)
942 draw
->cur_blit_source
= LOADER_DRI3_BACK_ID(draw
->cur_back
);
944 /* Exchange the back and fake front. Even though the server knows about these
945 * buffers, it has no notion of back and fake front.
947 if (back
&& draw
->have_fake_front
) {
948 struct loader_dri3_buffer
*tmp
;
950 tmp
= dri3_fake_front_buffer(draw
);
951 draw
->buffers
[LOADER_DRI3_FRONT_ID
] = back
;
952 draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)] = tmp
;
954 if (draw
->swap_method
== __DRI_ATTRIB_SWAP_COPY
|| force_copy
)
955 draw
->cur_blit_source
= LOADER_DRI3_FRONT_ID
;
958 dri3_flush_present_events(draw
);
960 if (back
&& !draw
->is_pixmap
) {
961 dri3_fence_reset(draw
->conn
, back
);
963 /* Compute when we want the frame shown by taking the last known
964 * successful MSC and adding in a swap interval for each outstanding swap
965 * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
969 if (target_msc
== 0 && divisor
== 0 && remainder
== 0)
970 target_msc
= draw
->msc
+ draw
->swap_interval
*
971 (draw
->send_sbc
- draw
->recv_sbc
);
972 else if (divisor
== 0 && remainder
> 0) {
973 /* From the GLX_OML_sync_control spec:
974 * "If <divisor> = 0, the swap will occur when MSC becomes
975 * greater than or equal to <target_msc>."
977 * Note that there's no mention of the remainder. The Present
978 * extension throws BadValue for remainder != 0 with divisor == 0, so
979 * just drop the passed in value.
984 /* From the GLX_EXT_swap_control spec
985 * and the EGL 1.4 spec (page 53):
987 * "If <interval> is set to a value of 0, buffer swaps are not
988 * synchronized to a video frame."
990 * Implementation note: It is possible to enable triple buffering
991 * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
994 if (draw
->swap_interval
== 0)
995 options
|= XCB_PRESENT_OPTION_ASYNC
;
997 /* If we need to populate the new back, but need to reuse the back
998 * buffer slot due to lack of local blit capabilities, make sure
999 * the server doesn't flip and we deadlock.
1001 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1)
1002 options
|= XCB_PRESENT_OPTION_COPY
;
1003 #ifdef HAVE_DRI3_MODIFIERS
1004 if (draw
->multiplanes_available
)
1005 options
|= XCB_PRESENT_OPTION_SUBOPTIMAL
;
1008 back
->last_swap
= draw
->send_sbc
;
1009 xcb_present_pixmap(draw
->conn
,
1012 (uint32_t) draw
->send_sbc
,
1017 None
, /* target_crtc */
1023 remainder
, 0, NULL
);
1024 ret
= (int64_t) draw
->send_sbc
;
1026 /* Schedule a server-side back-preserving blit if necessary.
1027 * This happens iff all conditions below are satisfied:
1028 * a) We have a fake front,
1029 * b) We need to preserve the back buffer,
1030 * c) We don't have local blit capabilities.
1032 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1 &&
1033 draw
->cur_blit_source
!= LOADER_DRI3_BACK_ID(draw
->cur_back
)) {
1034 struct loader_dri3_buffer
*new_back
= dri3_back_buffer(draw
);
1035 struct loader_dri3_buffer
*src
= draw
->buffers
[draw
->cur_blit_source
];
1037 dri3_fence_reset(draw
->conn
, new_back
);
1038 dri3_copy_area(draw
->conn
, src
->pixmap
,
1040 dri3_drawable_gc(draw
),
1041 0, 0, 0, 0, draw
->width
, draw
->height
);
1042 dri3_fence_trigger(draw
->conn
, new_back
);
1043 new_back
->last_swap
= src
->last_swap
;
1046 xcb_flush(draw
->conn
);
1050 mtx_unlock(&draw
->mtx
);
1052 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
1058 loader_dri3_query_buffer_age(struct loader_dri3_drawable
*draw
)
1060 struct loader_dri3_buffer
*back
= dri3_find_back_alloc(draw
);
1063 mtx_lock(&draw
->mtx
);
1064 ret
= (!back
|| back
->last_swap
== 0) ? 0 :
1065 draw
->send_sbc
- back
->last_swap
+ 1;
1066 mtx_unlock(&draw
->mtx
);
1071 /** loader_dri3_open
1073 * Wrapper around xcb_dri3_open
1076 loader_dri3_open(xcb_connection_t
*conn
,
1080 xcb_dri3_open_cookie_t cookie
;
1081 xcb_dri3_open_reply_t
*reply
;
1084 cookie
= xcb_dri3_open(conn
,
1088 reply
= xcb_dri3_open_reply(conn
, cookie
, NULL
);
1092 if (reply
->nfd
!= 1) {
1097 fd
= xcb_dri3_open_reply_fds(conn
, reply
)[0];
1099 fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
1105 dri3_cpp_for_format(uint32_t format
) {
1107 case __DRI_IMAGE_FORMAT_R8
:
1109 case __DRI_IMAGE_FORMAT_RGB565
:
1110 case __DRI_IMAGE_FORMAT_GR88
:
1112 case __DRI_IMAGE_FORMAT_XRGB8888
:
1113 case __DRI_IMAGE_FORMAT_ARGB8888
:
1114 case __DRI_IMAGE_FORMAT_ABGR8888
:
1115 case __DRI_IMAGE_FORMAT_XBGR8888
:
1116 case __DRI_IMAGE_FORMAT_XRGB2101010
:
1117 case __DRI_IMAGE_FORMAT_ARGB2101010
:
1118 case __DRI_IMAGE_FORMAT_XBGR2101010
:
1119 case __DRI_IMAGE_FORMAT_ABGR2101010
:
1120 case __DRI_IMAGE_FORMAT_SARGB8
:
1121 case __DRI_IMAGE_FORMAT_SABGR8
:
1123 case __DRI_IMAGE_FORMAT_XBGR16161616F
:
1124 case __DRI_IMAGE_FORMAT_ABGR16161616F
:
1126 case __DRI_IMAGE_FORMAT_NONE
:
1132 /* Map format of render buffer to corresponding format for the linear_buffer
1133 * used for sharing with the display gpu of a Prime setup (== is_different_gpu).
1134 * Usually linear_format == format, except for depth >= 30 formats, where
1135 * different gpu vendors have different preferences wrt. color channel ordering.
1138 dri3_linear_format_for_format(struct loader_dri3_drawable
*draw
, uint32_t format
)
1141 case __DRI_IMAGE_FORMAT_XRGB2101010
:
1142 case __DRI_IMAGE_FORMAT_XBGR2101010
:
1143 /* Different preferred formats for different hw */
1144 if (dri3_get_red_mask_for_depth(draw
, 30) == 0x3ff)
1145 return __DRI_IMAGE_FORMAT_XBGR2101010
;
1147 return __DRI_IMAGE_FORMAT_XRGB2101010
;
1149 case __DRI_IMAGE_FORMAT_ARGB2101010
:
1150 case __DRI_IMAGE_FORMAT_ABGR2101010
:
1151 /* Different preferred formats for different hw */
1152 if (dri3_get_red_mask_for_depth(draw
, 30) == 0x3ff)
1153 return __DRI_IMAGE_FORMAT_ABGR2101010
;
1155 return __DRI_IMAGE_FORMAT_ARGB2101010
;
1162 /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
1163 * the createImageFromFds call takes DRM_FORMAT codes. To avoid
1164 * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
1165 * translate to DRM_FORMAT codes in the call to createImageFromFds
1168 image_format_to_fourcc(int format
)
1171 /* Convert from __DRI_IMAGE_FORMAT to DRM_FORMAT (sigh) */
1173 case __DRI_IMAGE_FORMAT_SARGB8
: return __DRI_IMAGE_FOURCC_SARGB8888
;
1174 case __DRI_IMAGE_FORMAT_SABGR8
: return __DRI_IMAGE_FOURCC_SABGR8888
;
1175 case __DRI_IMAGE_FORMAT_RGB565
: return DRM_FORMAT_RGB565
;
1176 case __DRI_IMAGE_FORMAT_XRGB8888
: return DRM_FORMAT_XRGB8888
;
1177 case __DRI_IMAGE_FORMAT_ARGB8888
: return DRM_FORMAT_ARGB8888
;
1178 case __DRI_IMAGE_FORMAT_ABGR8888
: return DRM_FORMAT_ABGR8888
;
1179 case __DRI_IMAGE_FORMAT_XBGR8888
: return DRM_FORMAT_XBGR8888
;
1180 case __DRI_IMAGE_FORMAT_XRGB2101010
: return DRM_FORMAT_XRGB2101010
;
1181 case __DRI_IMAGE_FORMAT_ARGB2101010
: return DRM_FORMAT_ARGB2101010
;
1182 case __DRI_IMAGE_FORMAT_XBGR2101010
: return DRM_FORMAT_XBGR2101010
;
1183 case __DRI_IMAGE_FORMAT_ABGR2101010
: return DRM_FORMAT_ABGR2101010
;
1184 case __DRI_IMAGE_FORMAT_XBGR16161616F
: return DRM_FORMAT_XBGR16161616F
;
1185 case __DRI_IMAGE_FORMAT_ABGR16161616F
: return DRM_FORMAT_ABGR16161616F
;
1190 #ifdef HAVE_DRI3_MODIFIERS
1192 has_supported_modifier(struct loader_dri3_drawable
*draw
, unsigned int format
,
1193 uint64_t *modifiers
, uint32_t count
)
1195 uint64_t *supported_modifiers
;
1196 int32_t supported_modifiers_count
;
1200 if (!draw
->ext
->image
->queryDmaBufModifiers(draw
->dri_screen
,
1201 format
, 0, NULL
, NULL
,
1202 &supported_modifiers_count
) ||
1203 supported_modifiers_count
== 0)
1206 supported_modifiers
= malloc(supported_modifiers_count
* sizeof(uint64_t));
1207 if (!supported_modifiers
)
1210 draw
->ext
->image
->queryDmaBufModifiers(draw
->dri_screen
, format
,
1211 supported_modifiers_count
,
1212 supported_modifiers
, NULL
,
1213 &supported_modifiers_count
);
1215 for (i
= 0; !found
&& i
< supported_modifiers_count
; i
++) {
1216 for (j
= 0; !found
&& j
< count
; j
++) {
1217 if (supported_modifiers
[i
] == modifiers
[j
])
1222 free(supported_modifiers
);
1227 /** loader_dri3_alloc_render_buffer
1229 * Use the driver createImage function to construct a __DRIimage, then
1230 * get a file descriptor for that and create an X pixmap from that
1232 * Allocate an xshmfence for synchronization
1234 static struct loader_dri3_buffer
*
1235 dri3_alloc_render_buffer(struct loader_dri3_drawable
*draw
, unsigned int format
,
1236 int width
, int height
, int depth
)
1238 struct loader_dri3_buffer
*buffer
;
1239 __DRIimage
*pixmap_buffer
;
1240 xcb_pixmap_t pixmap
;
1241 xcb_sync_fence_t sync_fence
;
1242 struct xshmfence
*shm_fence
;
1243 int buffer_fds
[4], fence_fd
;
1248 /* Create an xshmfence object and
1249 * prepare to send that to the X server
1252 fence_fd
= xshmfence_alloc_shm();
1256 shm_fence
= xshmfence_map_shm(fence_fd
);
1257 if (shm_fence
== NULL
)
1260 /* Allocate the image from the driver
1262 buffer
= calloc(1, sizeof *buffer
);
1266 buffer
->cpp
= dri3_cpp_for_format(format
);
1270 if (!draw
->is_different_gpu
) {
1271 #ifdef HAVE_DRI3_MODIFIERS
1272 if (draw
->multiplanes_available
&&
1273 draw
->ext
->image
->base
.version
>= 15 &&
1274 draw
->ext
->image
->queryDmaBufModifiers
&&
1275 draw
->ext
->image
->createImageWithModifiers
) {
1276 xcb_dri3_get_supported_modifiers_cookie_t mod_cookie
;
1277 xcb_dri3_get_supported_modifiers_reply_t
*mod_reply
;
1278 xcb_generic_error_t
*error
= NULL
;
1279 uint64_t *modifiers
= NULL
;
1282 mod_cookie
= xcb_dri3_get_supported_modifiers(draw
->conn
,
1284 depth
, buffer
->cpp
* 8);
1285 mod_reply
= xcb_dri3_get_supported_modifiers_reply(draw
->conn
,
1291 if (mod_reply
->num_window_modifiers
) {
1292 count
= mod_reply
->num_window_modifiers
;
1293 modifiers
= malloc(count
* sizeof(uint64_t));
1300 xcb_dri3_get_supported_modifiers_window_modifiers(mod_reply
),
1301 count
* sizeof(uint64_t));
1303 if (!has_supported_modifier(draw
, image_format_to_fourcc(format
),
1304 modifiers
, count
)) {
1311 if (mod_reply
->num_screen_modifiers
&& modifiers
== NULL
) {
1312 count
= mod_reply
->num_screen_modifiers
;
1313 modifiers
= malloc(count
* sizeof(uint64_t));
1321 xcb_dri3_get_supported_modifiers_screen_modifiers(mod_reply
),
1322 count
* sizeof(uint64_t));
1327 /* don't use createImageWithModifiers() if we have no
1328 * modifiers, other things depend on the use flags when
1329 * there are no modifiers to know that a buffer can be
1333 buffer
->image
= draw
->ext
->image
->createImageWithModifiers(draw
->dri_screen
,
1345 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1348 __DRI_IMAGE_USE_SHARE
|
1349 __DRI_IMAGE_USE_SCANOUT
|
1350 __DRI_IMAGE_USE_BACKBUFFER
,
1353 pixmap_buffer
= buffer
->image
;
1358 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1367 buffer
->linear_buffer
=
1368 draw
->ext
->image
->createImage(draw
->dri_screen
,
1370 dri3_linear_format_for_format(draw
, format
),
1371 __DRI_IMAGE_USE_SHARE
|
1372 __DRI_IMAGE_USE_LINEAR
|
1373 __DRI_IMAGE_USE_BACKBUFFER
,
1375 pixmap_buffer
= buffer
->linear_buffer
;
1377 if (!buffer
->linear_buffer
)
1378 goto no_linear_buffer
;
1381 /* X want some information about the planes, so ask the image for it
1383 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_NUM_PLANES
,
1387 for (i
= 0; i
< num_planes
; i
++) {
1388 __DRIimage
*image
= draw
->ext
->image
->fromPlanar(pixmap_buffer
, i
, NULL
);
1392 image
= pixmap_buffer
;
1395 ret
= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_FD
,
1397 ret
&= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_STRIDE
,
1398 &buffer
->strides
[i
]);
1399 ret
&= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_OFFSET
,
1400 &buffer
->offsets
[i
]);
1401 if (image
!= pixmap_buffer
)
1402 draw
->ext
->image
->destroyImage(image
);
1405 goto no_buffer_attrib
;
1408 ret
= draw
->ext
->image
->queryImage(pixmap_buffer
,
1409 __DRI_IMAGE_ATTRIB_MODIFIER_UPPER
, &mod
);
1410 buffer
->modifier
= (uint64_t) mod
<< 32;
1411 ret
&= draw
->ext
->image
->queryImage(pixmap_buffer
,
1412 __DRI_IMAGE_ATTRIB_MODIFIER_LOWER
, &mod
);
1413 buffer
->modifier
|= (uint64_t)(mod
& 0xffffffff);
1416 buffer
->modifier
= DRM_FORMAT_MOD_INVALID
;
1418 pixmap
= xcb_generate_id(draw
->conn
);
1419 #ifdef HAVE_DRI3_MODIFIERS
1420 if (draw
->multiplanes_available
&&
1421 buffer
->modifier
!= DRM_FORMAT_MOD_INVALID
) {
1422 xcb_dri3_pixmap_from_buffers(draw
->conn
,
1427 buffer
->strides
[0], buffer
->offsets
[0],
1428 buffer
->strides
[1], buffer
->offsets
[1],
1429 buffer
->strides
[2], buffer
->offsets
[2],
1430 buffer
->strides
[3], buffer
->offsets
[3],
1431 depth
, buffer
->cpp
* 8,
1437 xcb_dri3_pixmap_from_buffer(draw
->conn
,
1441 width
, height
, buffer
->strides
[0],
1442 depth
, buffer
->cpp
* 8,
1446 xcb_dri3_fence_from_fd(draw
->conn
,
1448 (sync_fence
= xcb_generate_id(draw
->conn
)),
1452 buffer
->pixmap
= pixmap
;
1453 buffer
->own_pixmap
= true;
1454 buffer
->sync_fence
= sync_fence
;
1455 buffer
->shm_fence
= shm_fence
;
1456 buffer
->width
= width
;
1457 buffer
->height
= height
;
1459 /* Mark the buffer as idle
1461 dri3_fence_set(buffer
);
1467 close(buffer_fds
[i
]);
1469 draw
->ext
->image
->destroyImage(pixmap_buffer
);
1471 if (draw
->is_different_gpu
)
1472 draw
->ext
->image
->destroyImage(buffer
->image
);
1476 xshmfence_unmap_shm(shm_fence
);
1482 /** loader_dri3_update_drawable
1484 * Called the first time we use the drawable and then
1485 * after we receive present configure notify events to
1486 * track the geometry of the drawable
1489 dri3_update_drawable(struct loader_dri3_drawable
*draw
)
1491 mtx_lock(&draw
->mtx
);
1492 if (draw
->first_init
) {
1493 xcb_get_geometry_cookie_t geom_cookie
;
1494 xcb_get_geometry_reply_t
*geom_reply
;
1495 xcb_void_cookie_t cookie
;
1496 xcb_generic_error_t
*error
;
1497 xcb_present_query_capabilities_cookie_t present_capabilities_cookie
;
1498 xcb_present_query_capabilities_reply_t
*present_capabilities_reply
;
1499 xcb_window_t root_win
;
1501 draw
->first_init
= false;
1503 /* Try to select for input on the window.
1505 * If the drawable is a window, this will get our events
1508 * Otherwise, we'll get a BadWindow error back from this request which
1509 * will let us know that the drawable is a pixmap instead.
1512 draw
->eid
= xcb_generate_id(draw
->conn
);
1514 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
1515 XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY
|
1516 XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY
|
1517 XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY
);
1519 present_capabilities_cookie
=
1520 xcb_present_query_capabilities(draw
->conn
, draw
->drawable
);
1522 /* Create an XCB event queue to hold present events outside of the usual
1523 * application event queue
1525 draw
->special_event
= xcb_register_for_special_xge(draw
->conn
,
1529 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1531 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1534 mtx_unlock(&draw
->mtx
);
1537 draw
->width
= geom_reply
->width
;
1538 draw
->height
= geom_reply
->height
;
1539 draw
->depth
= geom_reply
->depth
;
1540 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1541 root_win
= geom_reply
->root
;
1545 draw
->is_pixmap
= false;
1547 /* Check to see if our select input call failed. If it failed with a
1548 * BadWindow error, then assume the drawable is a pixmap. Destroy the
1549 * special event queue created above and mark the drawable as a pixmap
1552 error
= xcb_request_check(draw
->conn
, cookie
);
1554 present_capabilities_reply
=
1555 xcb_present_query_capabilities_reply(draw
->conn
,
1556 present_capabilities_cookie
,
1559 if (present_capabilities_reply
) {
1560 draw
->present_capabilities
= present_capabilities_reply
->capabilities
;
1561 free(present_capabilities_reply
);
1563 draw
->present_capabilities
= 0;
1566 if (error
->error_code
!= BadWindow
) {
1568 mtx_unlock(&draw
->mtx
);
1572 draw
->is_pixmap
= true;
1573 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
1574 draw
->special_event
= NULL
;
1577 if (draw
->is_pixmap
)
1578 draw
->window
= root_win
;
1580 draw
->window
= draw
->drawable
;
1582 dri3_flush_present_events(draw
);
1583 mtx_unlock(&draw
->mtx
);
1588 loader_dri3_create_image(xcb_connection_t
*c
,
1589 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
,
1590 unsigned int format
,
1591 __DRIscreen
*dri_screen
,
1592 const __DRIimageExtension
*image
,
1593 void *loaderPrivate
)
1596 __DRIimage
*image_planar
, *ret
;
1599 /* Get an FD for the pixmap object
1601 fds
= xcb_dri3_buffer_from_pixmap_reply_fds(c
, bp_reply
);
1603 stride
= bp_reply
->stride
;
1606 /* createImageFromFds creates a wrapper __DRIimage structure which
1607 * can deal with multiple planes for things like Yuv images. So, once
1608 * we've gotten the planar wrapper, pull the single plane out of it and
1609 * discard the wrapper.
1611 image_planar
= image
->createImageFromFds(dri_screen
,
1614 image_format_to_fourcc(format
),
1616 &stride
, &offset
, loaderPrivate
);
1621 ret
= image
->fromPlanar(image_planar
, 0, loaderPrivate
);
1626 image
->destroyImage(image_planar
);
1631 #ifdef HAVE_DRI3_MODIFIERS
1633 loader_dri3_create_image_from_buffers(xcb_connection_t
*c
,
1634 xcb_dri3_buffers_from_pixmap_reply_t
*bp_reply
,
1635 unsigned int format
,
1636 __DRIscreen
*dri_screen
,
1637 const __DRIimageExtension
*image
,
1638 void *loaderPrivate
)
1642 uint32_t *strides_in
, *offsets_in
;
1643 int strides
[4], offsets
[4];
1647 if (bp_reply
->nfd
> 4)
1650 fds
= xcb_dri3_buffers_from_pixmap_reply_fds(c
, bp_reply
);
1651 strides_in
= xcb_dri3_buffers_from_pixmap_strides(bp_reply
);
1652 offsets_in
= xcb_dri3_buffers_from_pixmap_offsets(bp_reply
);
1653 for (i
= 0; i
< bp_reply
->nfd
; i
++) {
1654 strides
[i
] = strides_in
[i
];
1655 offsets
[i
] = offsets_in
[i
];
1658 ret
= image
->createImageFromDmaBufs2(dri_screen
,
1661 image_format_to_fourcc(format
),
1665 0, 0, 0, 0, /* UNDEFINED */
1666 &error
, loaderPrivate
);
1668 for (i
= 0; i
< bp_reply
->nfd
; i
++)
1675 /** dri3_get_pixmap_buffer
1677 * Get the DRM object for a pixmap from the X server and
1678 * wrap that with a __DRIimage structure using createImageFromFds
1680 static struct loader_dri3_buffer
*
1681 dri3_get_pixmap_buffer(__DRIdrawable
*driDrawable
, unsigned int format
,
1682 enum loader_dri3_buffer_type buffer_type
,
1683 struct loader_dri3_drawable
*draw
)
1685 int buf_id
= loader_dri3_pixmap_buf_id(buffer_type
);
1686 struct loader_dri3_buffer
*buffer
= draw
->buffers
[buf_id
];
1687 xcb_drawable_t pixmap
;
1688 xcb_sync_fence_t sync_fence
;
1689 struct xshmfence
*shm_fence
;
1693 __DRIscreen
*cur_screen
;
1698 pixmap
= draw
->drawable
;
1700 buffer
= calloc(1, sizeof *buffer
);
1704 fence_fd
= xshmfence_alloc_shm();
1707 shm_fence
= xshmfence_map_shm(fence_fd
);
1708 if (shm_fence
== NULL
) {
1713 /* Get the currently-bound screen or revert to using the drawable's screen if
1714 * no contexts are currently bound. The latter case is at least necessary for
1715 * obs-studio, when using Window Capture (Xcomposite) as a Source.
1717 cur_screen
= draw
->vtable
->get_dri_screen();
1719 cur_screen
= draw
->dri_screen
;
1722 xcb_dri3_fence_from_fd(draw
->conn
,
1724 (sync_fence
= xcb_generate_id(draw
->conn
)),
1727 #ifdef HAVE_DRI3_MODIFIERS
1728 if (draw
->multiplanes_available
&&
1729 draw
->ext
->image
->base
.version
>= 15 &&
1730 draw
->ext
->image
->createImageFromDmaBufs2
) {
1731 xcb_dri3_buffers_from_pixmap_cookie_t bps_cookie
;
1732 xcb_dri3_buffers_from_pixmap_reply_t
*bps_reply
;
1734 bps_cookie
= xcb_dri3_buffers_from_pixmap(draw
->conn
, pixmap
);
1735 bps_reply
= xcb_dri3_buffers_from_pixmap_reply(draw
->conn
, bps_cookie
,
1740 loader_dri3_create_image_from_buffers(draw
->conn
, bps_reply
, format
,
1741 cur_screen
, draw
->ext
->image
,
1743 width
= bps_reply
->width
;
1744 height
= bps_reply
->height
;
1749 xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie
;
1750 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
;
1752 bp_cookie
= xcb_dri3_buffer_from_pixmap(draw
->conn
, pixmap
);
1753 bp_reply
= xcb_dri3_buffer_from_pixmap_reply(draw
->conn
, bp_cookie
, NULL
);
1757 buffer
->image
= loader_dri3_create_image(draw
->conn
, bp_reply
, format
,
1758 cur_screen
, draw
->ext
->image
,
1760 width
= bp_reply
->width
;
1761 height
= bp_reply
->height
;
1768 buffer
->pixmap
= pixmap
;
1769 buffer
->own_pixmap
= false;
1770 buffer
->width
= width
;
1771 buffer
->height
= height
;
1772 buffer
->shm_fence
= shm_fence
;
1773 buffer
->sync_fence
= sync_fence
;
1775 draw
->buffers
[buf_id
] = buffer
;
1780 xcb_sync_destroy_fence(draw
->conn
, sync_fence
);
1781 xshmfence_unmap_shm(shm_fence
);
1790 * Find a front or back buffer, allocating new ones as necessary
1792 static struct loader_dri3_buffer
*
1793 dri3_get_buffer(__DRIdrawable
*driDrawable
,
1794 unsigned int format
,
1795 enum loader_dri3_buffer_type buffer_type
,
1796 struct loader_dri3_drawable
*draw
)
1798 struct loader_dri3_buffer
*buffer
;
1799 bool fence_await
= buffer_type
== loader_dri3_buffer_back
;
1802 if (buffer_type
== loader_dri3_buffer_back
) {
1803 draw
->back_format
= format
;
1805 buf_id
= dri3_find_back(draw
);
1810 buf_id
= LOADER_DRI3_FRONT_ID
;
1813 buffer
= draw
->buffers
[buf_id
];
1815 /* Allocate a new buffer if there isn't an old one, if that
1816 * old one is the wrong size, or if it's suboptimal
1818 if (!buffer
|| buffer
->width
!= draw
->width
||
1819 buffer
->height
!= draw
->height
||
1820 buffer
->reallocate
) {
1821 struct loader_dri3_buffer
*new_buffer
;
1823 /* Allocate the new buffers
1825 new_buffer
= dri3_alloc_render_buffer(draw
,
1833 /* When resizing, copy the contents of the old buffer, waiting for that
1834 * copy to complete using our fences before proceeding
1836 if ((buffer_type
== loader_dri3_buffer_back
||
1837 (buffer_type
== loader_dri3_buffer_front
&& draw
->have_fake_front
))
1840 /* Fill the new buffer with data from an old buffer */
1841 if (!loader_dri3_blit_image(draw
,
1845 MIN2(buffer
->width
, new_buffer
->width
),
1846 MIN2(buffer
->height
, new_buffer
->height
),
1848 !buffer
->linear_buffer
) {
1849 dri3_fence_reset(draw
->conn
, new_buffer
);
1850 dri3_copy_area(draw
->conn
,
1853 dri3_drawable_gc(draw
),
1855 draw
->width
, draw
->height
);
1856 dri3_fence_trigger(draw
->conn
, new_buffer
);
1859 dri3_free_render_buffer(draw
, buffer
);
1860 } else if (buffer_type
== loader_dri3_buffer_front
) {
1861 /* Fill the new fake front with data from a real front */
1862 loader_dri3_swapbuffer_barrier(draw
);
1863 dri3_fence_reset(draw
->conn
, new_buffer
);
1864 dri3_copy_area(draw
->conn
,
1867 dri3_drawable_gc(draw
),
1869 draw
->width
, draw
->height
);
1870 dri3_fence_trigger(draw
->conn
, new_buffer
);
1872 if (new_buffer
->linear_buffer
) {
1873 dri3_fence_await(draw
->conn
, draw
, new_buffer
);
1874 (void) loader_dri3_blit_image(draw
,
1876 new_buffer
->linear_buffer
,
1877 0, 0, draw
->width
, draw
->height
,
1882 buffer
= new_buffer
;
1883 draw
->buffers
[buf_id
] = buffer
;
1887 dri3_fence_await(draw
->conn
, draw
, buffer
);
1890 * Do we need to preserve the content of a previous buffer?
1892 * Note that this blit is needed only to avoid a wait for a buffer that
1893 * is currently in the flip chain or being scanned out from. That's really
1894 * a tradeoff. If we're ok with the wait we can reduce the number of back
1895 * buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
1896 * but in the latter case we must disallow page-flipping.
1898 if (buffer_type
== loader_dri3_buffer_back
&&
1899 draw
->cur_blit_source
!= -1 &&
1900 draw
->buffers
[draw
->cur_blit_source
] &&
1901 buffer
!= draw
->buffers
[draw
->cur_blit_source
]) {
1903 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
1905 /* Avoid flushing here. Will propably do good for tiling hardware. */
1906 (void) loader_dri3_blit_image(draw
,
1909 0, 0, draw
->width
, draw
->height
,
1911 buffer
->last_swap
= source
->last_swap
;
1912 draw
->cur_blit_source
= -1;
1914 /* Return the requested buffer */
1918 /** dri3_free_buffers
1920 * Free the front bufffer or all of the back buffers. Used
1921 * when the application changes which buffers it needs
1924 dri3_free_buffers(__DRIdrawable
*driDrawable
,
1925 enum loader_dri3_buffer_type buffer_type
,
1926 struct loader_dri3_drawable
*draw
)
1928 struct loader_dri3_buffer
*buffer
;
1933 switch (buffer_type
) {
1934 case loader_dri3_buffer_back
:
1935 first_id
= LOADER_DRI3_BACK_ID(0);
1936 n_id
= LOADER_DRI3_MAX_BACK
;
1937 draw
->cur_blit_source
= -1;
1939 case loader_dri3_buffer_front
:
1940 first_id
= LOADER_DRI3_FRONT_ID
;
1941 /* Don't free a fake front holding new backbuffer content. */
1942 n_id
= (draw
->cur_blit_source
== LOADER_DRI3_FRONT_ID
) ? 0 : 1;
1945 for (buf_id
= first_id
; buf_id
< first_id
+ n_id
; buf_id
++) {
1946 buffer
= draw
->buffers
[buf_id
];
1948 dri3_free_render_buffer(draw
, buffer
);
1949 draw
->buffers
[buf_id
] = NULL
;
1954 /** loader_dri3_get_buffers
1956 * The published buffer allocation API.
1957 * Returns all of the necessary buffers, allocating
1961 loader_dri3_get_buffers(__DRIdrawable
*driDrawable
,
1962 unsigned int format
,
1964 void *loaderPrivate
,
1965 uint32_t buffer_mask
,
1966 struct __DRIimageList
*buffers
)
1968 struct loader_dri3_drawable
*draw
= loaderPrivate
;
1969 struct loader_dri3_buffer
*front
, *back
;
1972 buffers
->image_mask
= 0;
1973 buffers
->front
= NULL
;
1974 buffers
->back
= NULL
;
1979 if (!dri3_update_drawable(draw
))
1982 dri3_update_num_back(draw
);
1984 /* Free no longer needed back buffers */
1985 for (buf_id
= draw
->num_back
; buf_id
< LOADER_DRI3_MAX_BACK
; buf_id
++) {
1986 if (draw
->cur_blit_source
!= buf_id
&& draw
->buffers
[buf_id
]) {
1987 dri3_free_render_buffer(draw
, draw
->buffers
[buf_id
]);
1988 draw
->buffers
[buf_id
] = NULL
;
1992 /* pixmaps always have front buffers.
1993 * Exchange swaps also mandate fake front buffers.
1995 if (draw
->is_pixmap
|| draw
->swap_method
== __DRI_ATTRIB_SWAP_EXCHANGE
)
1996 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1998 if (buffer_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1999 /* All pixmaps are owned by the server gpu.
2000 * When we use a different gpu, we can't use the pixmap
2001 * as buffer since it is potentially tiled a way
2002 * our device can't understand. In this case, use
2003 * a fake front buffer. Hopefully the pixmap
2004 * content will get synced with the fake front
2007 if (draw
->is_pixmap
&& !draw
->is_different_gpu
)
2008 front
= dri3_get_pixmap_buffer(driDrawable
,
2010 loader_dri3_buffer_front
,
2013 front
= dri3_get_buffer(driDrawable
,
2015 loader_dri3_buffer_front
,
2021 dri3_free_buffers(driDrawable
, loader_dri3_buffer_front
, draw
);
2022 draw
->have_fake_front
= 0;
2025 if (buffer_mask
& __DRI_IMAGE_BUFFER_BACK
) {
2026 back
= dri3_get_buffer(driDrawable
,
2028 loader_dri3_buffer_back
,
2032 draw
->have_back
= 1;
2034 dri3_free_buffers(driDrawable
, loader_dri3_buffer_back
, draw
);
2035 draw
->have_back
= 0;
2039 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
2040 buffers
->front
= front
->image
;
2041 draw
->have_fake_front
= draw
->is_different_gpu
|| !draw
->is_pixmap
;
2045 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_BACK
;
2046 buffers
->back
= back
->image
;
2049 draw
->stamp
= stamp
;
2054 /** loader_dri3_update_drawable_geometry
2056 * Get the current drawable geometry.
2059 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable
*draw
)
2061 xcb_get_geometry_cookie_t geom_cookie
;
2062 xcb_get_geometry_reply_t
*geom_reply
;
2064 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
2066 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
2069 draw
->width
= geom_reply
->width
;
2070 draw
->height
= geom_reply
->height
;
2071 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
2072 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
2080 * Make sure the server has flushed all pending swap buffers to hardware
2081 * for this drawable. Ideally we'd want to send an X protocol request to
2082 * have the server block our connection until the swaps are complete. That
2083 * would avoid the potential round-trip here.
2086 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable
*draw
)
2088 int64_t ust
, msc
, sbc
;
2090 (void) loader_dri3_wait_for_sbc(draw
, 0, &ust
, &msc
, &sbc
);
2094 * Perform any cleanup associated with a close screen operation.
2095 * \param dri_screen[in,out] Pointer to __DRIscreen about to be closed.
2097 * This function destroys the screen's cached swap context if any.
2100 loader_dri3_close_screen(__DRIscreen
*dri_screen
)
2102 mtx_lock(&blit_context
.mtx
);
2103 if (blit_context
.ctx
&& blit_context
.cur_screen
== dri_screen
) {
2104 blit_context
.core
->destroyContext(blit_context
.ctx
);
2105 blit_context
.ctx
= NULL
;
2107 mtx_unlock(&blit_context
.mtx
);
2111 * Find a backbuffer slot - potentially allocating a back buffer
2113 * \param draw[in,out] Pointer to the drawable for which to find back.
2114 * \return Pointer to a new back buffer or NULL if allocation failed or was
2117 * Find a potentially new back buffer, and if it's not been allocated yet and
2118 * in addition needs initializing, then try to allocate and initialize it.
2121 static struct loader_dri3_buffer
*
2122 dri3_find_back_alloc(struct loader_dri3_drawable
*draw
)
2124 struct loader_dri3_buffer
*back
;
2127 id
= dri3_find_back(draw
);
2131 back
= draw
->buffers
[id
];
2132 /* Allocate a new back if we haven't got one */
2133 if (!back
&& draw
->back_format
!= __DRI_IMAGE_FORMAT_NONE
&&
2134 dri3_update_drawable(draw
))
2135 back
= dri3_alloc_render_buffer(draw
, draw
->back_format
,
2136 draw
->width
, draw
->height
, draw
->depth
);
2141 draw
->buffers
[id
] = back
;
2143 /* If necessary, prefill the back with data according to swap_method mode. */
2144 if (draw
->cur_blit_source
!= -1 &&
2145 draw
->buffers
[draw
->cur_blit_source
] &&
2146 back
!= draw
->buffers
[draw
->cur_blit_source
]) {
2147 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
2149 dri3_fence_await(draw
->conn
, draw
, source
);
2150 dri3_fence_await(draw
->conn
, draw
, back
);
2151 (void) loader_dri3_blit_image(draw
,
2154 0, 0, draw
->width
, draw
->height
,
2156 back
->last_swap
= source
->last_swap
;
2157 draw
->cur_blit_source
= -1;